查找字符并删除指定的行
file=”a.txt”
pattern=$1
repalcement=$2
lineNumber=$3
li=`cat $file | grep -n $pattern | sed s/:/\ / | awk ‘{print$1}’ | sed -n ${lineNumber}p`
li2=$((li))
echo $li2
sed “$li,${li}s/${pattern}/${repalcement}/” $file
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file=”a.txt”
pattern=$1
repalcement=$2
lineNumber=$3
li=`cat $file | grep -n $pattern | sed s/:/\ / | awk ‘{print$1}’ | sed -n ${lineNumber}p`
li2=$((li))
echo $li2
sed “$li,${li}s/${pattern}/${repalcement}/” $file